We flew back from our Christmas-New Year's trip to Kauai via Honolulu, and were able to visit the USS Arizona Memorial. I think this was the part of the trip that our son Alex was most looking forward to.
Way back in third grade (as in last year), Alex developed a keen interest in World War II, culminating in a class project on the bombing of Pearl Harbor. He researched the event for more than a month, and gave a rather stellar (no parental bias here) presentation and poster on the topic. When we told him we were coming home via Honolulu, the first thing he asked was whether we could stop at Pearl Harbor.
We found out from the Arizona Memorial website that tickets to the Arizona are free, but first-come first serve. We made a plan to get there early so we could take the ferry boat to the memorial. The ferry runs from 7:45 am - 3 pm daily, but you need a ticket with a specified time stamped on it to board the ferry to the memorial.